<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE html>
<html lang="en" class="no-js">
<head>
    <title>Yummy</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <link rel="stylesheet" href="../login/css/reset.css">

    <link rel="stylesheet" href="../login/css/supersized.css">

    <link rel="stylesheet" href="../login/css/style.css">

    <style type="text/css">
        html{height: 100%}
        body{margin: 0;height: 100%;
            background: #fff;}
        canvas{display: block;width: 100%;height: 100%;}
        .text{
            width: 100%;
            background: transparent;
            display: flex;
            justify-content: center;
            height: 100%;
            line-height: 100%;
            top: 0;
            position: absolute;
            top: 50%;
            font-size: 50px;
        }
    </style>
</head>
<body>
<canvas id="canvas"></canvas>
<div class="page-container" style="top: 10%;left: 0; bottom: 0; right: 0;position: absolute">
    <h1 style="color: #ef4300">Login</h1>

    <div>

        <input type="text" name="phone" class="phone" placeholder="Phone" id="phone">

        <input type="password" name="password" class="password" placeholder="Password" id="password">

        <button id="login_button">Sign in</button>

        <div class="error"><span>+</span></div>

    </div>

    <div class="signup">
        <a href="/j2ee/user/toRegister.do" style="text-decoration: none;font-size: 14px"><p style="color: #ef4300">Not a member?</p></a>
    </div>

    <div class="connect">

        <p style="color: #ef4300">Or connect with:</p>

        <p>

            <a class="qq" href=""></a>

            <a class="weixin" href=""></a>

            <a class="weibo" href=""></a>

        </p>

    </div>

</div>


<script src="../js/jquery-2.1.1.min.js"></script>

<script src="../login/js/supersized.3.2.7.min.js"></script>

<script src="../login/js/supersized-init.js"></script>

<script src="../login/js/scripts.js"></script>

<script type="text/javascript" src="../js/layer/layer.js"></script>
<script src="../js/yummy/login.js"></script>



<script type="text/javascript">
    class Circle {
        //创建对象
        //以一个圆为对象
        //设置随机的 x，y坐标，r半径，_mx，_my移动的距离
        //this.r是创建圆的半径，参数越大半径越大
        //this._mx,this._my是移动的距离，参数越大移动
        constructor(x, y) {
            this.x = x;
            this.y = y;
            this.r = Math.random() * 10 ;
            this._mx = Math.random() ;
            this._my = Math.random() ;

        }

        //canvas 画圆和画直线
        //画圆就是正常的用canvas画一个圆
        //画直线是两个圆连线，为了避免直线过多，给圆圈距离设置了一个值，距离很远的圆圈，就不做连线处理
        drawCircle(ctx) {
            ctx.beginPath();
            //arc() 方法使用一个中心点和半径，为一个画布的当前子路径添加一条弧。
            ctx.arc(this.x, this.y, this.r, 0, 360)
            ctx.closePath();
            ctx.fillStyle = 'rgba(204, 204, 204, 0.3)';
            ctx.fill();
        }

        drawLine(ctx, _circle) {
            let dx = this.x - _circle.x;
            let dy = this.y - _circle.y;
            let d = Math.sqrt(dx * dx + dy * dy)
            if (d < 150) {
                ctx.beginPath();
                //开始一条路径，移动到位置 this.x,this.y。创建到达位置 _circle.x,_circle.y 的一条线：
                ctx.moveTo(this.x, this.y);   //起始点
                ctx.lineTo(_circle.x, _circle.y);   //终点
                ctx.closePath();
                ctx.strokeStyle = 'rgba(204, 204, 204, 0.3)';
                ctx.stroke();
            }
        }

        // 圆圈移动
        // 圆圈移动的距离必须在屏幕范围内
        move(w, h) {
            this._mx = (this.x < w && this.x > 0) ? this._mx : (-this._mx);
            this._my = (this.y < h && this.y > 0) ? this._my : (-this._my);
            this.x += this._mx / 2;
            this.y += this._my / 2;
        }
    }
    //鼠标点画圆闪烁变动
    class currentCirle extends Circle {
        constructor(x, y) {
            super(x, y)
        }

        drawCircle(ctx) {
            ctx.beginPath();
            //注释内容为鼠标焦点的地方圆圈半径变化
            //this.r = (this.r < 14 && this.r > 1) ? this.r + (Math.random() * 2 - 1) : 2;
            this.r = 8;
            ctx.arc(this.x, this.y, this.r, 0, 360);
            ctx.closePath();
            //ctx.fillStyle = 'rgba(0,0,0,' + (parseInt(Math.random() * 100) / 100) + ')'
            ctx.fillStyle = 'rgba(255, 77, 54, 0.6)'
            ctx.fill();

        }
    }
    //更新页面用requestAnimationFrame替代setTimeout
    window.requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame;

    let canvas = document.getElementById('canvas');
    let ctx = canvas.getContext('2d');
    let w = canvas.width = canvas.offsetWidth;
    let h = canvas.height = canvas.offsetHeight;
    let circles = [];
    let current_circle = new currentCirle(0, 0)

    let draw = function () {
        ctx.clearRect(0, 0, w, h);
        for (let i = 0; i < circles.length; i++) {
            circles[i].move(w, h);
            circles[i].drawCircle(ctx);
            for (j = i + 1; j < circles.length; j++) {
                circles[i].drawLine(ctx, circles[j])
            }
        }
        if (current_circle.x) {
            current_circle.drawCircle(ctx);
            for (var k = 1; k < circles.length; k++) {
                current_circle.drawLine(ctx, circles[k])
            }
        }
        requestAnimationFrame(draw)
    }

    let init = function (num) {
        for (var i = 0; i < num; i++) {
            circles.push(new Circle(Math.random() * w, Math.random() * h));
        }
        draw();
    }
    window.addEventListener('load', init(60));
    window.onmousemove = function (e) {
        e = e || window.event;
        current_circle.x = e.clientX;
        current_circle.y = e.clientY;
    }
    window.onmouseout = function () {
        current_circle.x = null;
        current_circle.y = null;

    };
</script>
</body>

</html>


